Chem 110 Final – Flashcards
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Given an alkane, an alkene, and an alkyne, each of which contains two carbon atoms, which compound will contain the fewest hydrogens? A. The alkane B. The alkene C. The alkyne D. None, they all contain the same number of hydrogen atoms
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C. The alkyne
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A bond angle of 180 degrees is associated with the carbons in which functional group? A. alkanes B. alkenes C. alkynes D. arenes
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C. alkynes
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Which of the following general formulas could belong to that of a cyclic alkane? A. C2H6 B. C3H4 C. C4H10 D. C5H10
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D. C5H10
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Which of the following is generally true of most organic compounds? A. Their bonding is covalent B. Their aqueous solutions conduct electricity C. Both A and B D. Neither A nor B
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A. Their bonding is covalent
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Which of the following is the correct molecular formula for 2-methylpentane? A. C5H10 B. C5H12 C. C6H12 D. C6H14
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D. C6H14
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A chemist has two pure samples of an organic compound, one of which she obtained from a natural source, and one of which she synthesized in the lab. Which of the following properties can she use to determine which is the synthetic sample? A. Boiling point B. Formula weight C. Solubility D. None of these
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D. None of these
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Alkanes belong to which class of hydrocarbons? A. Alkali B. Aromatic C. Saturated D. Unsaturated
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C. Saturated
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Unbranched hydrocarbons are also called straight chain hydrocarbons. Which of the following is true of unbranched hydrocarbons? A. The C-C-C bond angle is 180 degrees B. No carbon atom is connected to more than two other carbon atoms C. Both A and B D. Neither A nor B
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B. No carbon atom is connected to more than two other carbon atoms
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For which class of compounds does the lack of free rotation around carbon-carbon bonds result in the existence of cis-trans isomerism? A. alkanes B. alkenes C. alkynes D. arenes
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B. alkenes
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If the bond angles at a carbon atom are 109.5 degrees, how many groups are distributed around the carbon atom? A. 1 B. 2 C. 3 D. 4
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D. 4
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The chemical formula of methylamine is CH3NH2. How many unshared electron pairs are associated with a molecule of methylamine? A. 1 B. 2 C. 8 D. 14
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A. 1
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Which of the following functional groups does not contain a carbonyl group? A. Ester B. Alcohol C. Aldehyde D. Ketone
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B. Alcohol
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Which of the following is not a correct IUPAC name for an alkene? A. 1-methyl-1-butene B. 2-methyl-1-butene C. 3-methyl-1-butene D. 2-methyl-2-butene
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A. 1-methyl-1-butene
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Which of the following correctly describes the relationship between butane and 2-methylpropane? A. They have the same molecular formula B. They have the same chemical properties C. They have the same physical properties D. All of the above
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A. They have the same molecular formula
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Which of the following, all of which have the molecular formula C5H10, has cis and trans isomers? A. 2-methyl-1-butene B. 2-methyl-2-butene C. 2-pentene D. None of the above
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C. 2-pentene
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Which of the following is the most characteristic reaction of alkenes? A. Addition B. Oxidation C. Reduction D. Substitution
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A. Addition
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Which of the following is the major product obtained from the dehydration of 2,3-dimethyl-3-pentanol? A. 2-isopropyl-2-butene B. 2,3-dimethyl-2-pentene C. 3,4-dimethyl-2-pentene D. None of the above
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B. 2,3-dimethyl-2-pentene
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Which of the following compounds reacts with sodium hydroxide (NaOH) to form water-soluble salts? A. 1 degree alcohols B. Phenols C. Both A and B D. Neither A nor B
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B. Phenols
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Which of the following is true regarding the C-C bonds in benzene? A. They are shorter than typical C-C single bonds. B. They are longer than typical C-C double bonds. C. Both A and B are true. D. Neither A nor B is true.
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C. Both A and B are true.
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Which of the following alcohols has the lowest boiling point? A. 1-pentanol B. 1-octanol C. 1-hexanol D. 1-heptanol
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A. 1-pentanol
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What type of alcohol is formed from the hydration of 2-methyl-2-butene? A.Primary B. Secondary C. Tertiary D. An alcohol is not formed
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C. Tertiary
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Which of the following compounds is an ether? A. Aniline B. Anisole C. Phenol D. Toluene
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B. Anisole
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Which of the following is true of the alcohol functional groups in 1,2-butanediol? A. One is primary and one is secondary. B. One is primary and one is tertiary. C. Both are primary. D. Neither is primary.
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A. One is primary and one is secondary.
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Markovnikov's rule is useful in predicting the outcome for which of the following addition reactions of unsymmetrical alkenes? A. hydration B. bromination C. both a and b D. neither a nor b
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A. hydration
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What product is obtained by the hydrobromination of 2-methyl-1-pentene? A. 1-bromo-2-methylpentane B. 2-bromo-2-methylpentane C. 2,3-dibromo-2-methylpentane D. 3,3-dibromo-2-methylpentane
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B. 2-bromo-2-methylpentane
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Dehydration of which type of alcohol can never result in a mixture of products? A. 1 degree B. 2 degree C. 3 degree D. None, mixtures can be obtained from any of these.
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A. 1 degree
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Which of the following compounds is most soluble in water? A. Propane B. Ethanol C. Trans-2-butene D. 2-pentanol
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B. Ethanol
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In a phenol, which group is the substituent on the benzene ring? A. Amino B. Carbonyl C. Carboxyl D. Hydroxyl
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D. Hydroxyl
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What is produced when benzene reacts with chlorine in the presence of an iron catalyst? A. Only chlorobenzene B. Chlorobenzene and chlorine atoms C. Chlorobenzene and hydrogen chloride D. Chlorobenzene and water
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C. Chlorobenzene and hydrogen chloride
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How many constitutional isomers are possible when there are two identical substituents on a benzene ring? A. 2 B. 3 C. 4 D. 5
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B. 3
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Which of the following alcohols will undergo acid-catalyzed dehydration most easily? A. 1-propanol B. 2-methyl-2-butanol C. 2-butanol D. 2-methyl-3-pentanol
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B. 2-methyl-2-butanol
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What is the smallest number of carbon atoms that can be present in a ketone? A. 1 B. 2 C. 3 D. 4
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C. 3
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When only one N- is part of the IUPAC name of the amine which of the following is true? A. The amine is 1 degrees B. The amine is 2 degrees C. The amine is 3 degrees D. The amine has more than one nitrogen atom
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B. The amine is 2 degrees
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Given the compounds 2,3-dichloropentane and 2-bromo-4-chloropentane, which of the following is true? A. Only 2,3-dichloropentane is chiral. B. Only 2-bromo-4-chloropentane is chiral. C. Both are chiral. D. Neither is chiral.
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C. Both are chiral.
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There are four alcohols with the molecular formula C4H9OH. How many of these are chiral? A. 0 B. 1 C. 2 D. 3
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B. 1
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Which of the following has the highest boiling point? A. butane B. 1-propanamine C. 1-propanol D. 2-propanone
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C. 1-propanol
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Which of the following gives the correct order of solubility in water? A. C2H5NH2 < C4H9NH2 < C6H13NH2 B. C2H5NH2 < C6H13NH2 < C4H9NH2 C. C6H13NH2 < C4H9NH2 < C2H5NH2 D. C6H13NH2 < C2H5NH2 < C4H9NH2
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C. C6H13NH2 < C4H9NH2 < C2H5NH2
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Which of the following is obtained by oxidizing hexanal? A. hexanal B. hexanol C. 2-hexanone D. hexanoic acid
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D. hexanoic acid
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Which of the following will be obtained by the reaction of pentanal with H2 in the presence of a transition metal catalyst? A. Pentene B. 1-pentanol C. 2-pentanol D. Pentanoic acid
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B. 1-pentanol
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In the reduction of an unsaturated aldehyde or ketone using H2 in the presence of a transition metal catalyst, which of the following statements is true? A. Both the C=C and C=O bonds are reduced at the same rate. B. The C=C bond is reduced more rapidly than the C=O bond. C. The C=O bond is reduced more rapidly than the C=C bond. D. Unsaturated aldehydes and ketones do not undergo reduction reactions under these conditions.
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B. The C=C bond is reduced more rapidly than the C=O bond.
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Which of the following is true? A. The N-H bond is nonpolar. B. The polarity of the N-H bond is less than that of the O-H bond. C. The polarity of the N-H bond is the same as that of the O-H bond. D. The polarity of the N-H bond is greater than that of the O-H bond.
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B. The polarity of the N-H bond is less than that of the O-H bond.
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How many stereoisomers are possible for a molecule that has three stereocenters? A. 2 B. 4 C. 8 D. 16
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C. 8
